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JPH0131432Y2 - - Google Patents

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Publication number
JPH0131432Y2
JPH0131432Y2 JP1983138994U JP13899483U JPH0131432Y2 JP H0131432 Y2 JPH0131432 Y2 JP H0131432Y2 JP 1983138994 U JP1983138994 U JP 1983138994U JP 13899483 U JP13899483 U JP 13899483U JP H0131432 Y2 JPH0131432 Y2 JP H0131432Y2
Authority
JP
Japan
Prior art keywords
retainer pin
insertion hole
chisel
retainer
pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP1983138994U
Other languages
Japanese (ja)
Other versions
JPS6045674U (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP13899483U priority Critical patent/JPS6045674U/en
Publication of JPS6045674U publication Critical patent/JPS6045674U/en
Application granted granted Critical
Publication of JPH0131432Y2 publication Critical patent/JPH0131432Y2/ja
Granted legal-status Critical Current

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  • Percussive Tools And Related Accessories (AREA)

Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は、衝撃工具のチゼル取付装置に関す
る。
[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a chisel attachment device for an impact tool.

(従来技術) 上記衝撃工具とは、例えばコンクリートブレー
カ、さく岩機等を意味し、工具本体、この工具本
体の前部に挿入保持されるチゼル、ビツトロツド
等の衝撃要素(以下、本明細書においては単にチ
ゼルと称する)、および該チゼルを、上記工具本
体の前部に挿入された状態で保持するチゼル取付
装置を含んでいる。上記チゼル取付装置として
は、例えば実開昭57−75984号に示されているよ
うに、工具本体の前部を、上記チゼルの挿入方向
と直交する方向に貫通して延びるリテーナピン嵌
挿孔に、リテーナピンを嵌挿することによつて、
チゼルを工具本体に取付けるようになつている。
しかしながら、リテーナピンは上記嵌挿孔に嵌挿
しただけでは該孔から脱落してしまうので、リテ
ーナピンの一端部に、その直径方向に貫通して延
びる抜止めピン嵌挿孔を形成し、この嵌挿孔に抜
止めピンを嵌挿することによつて、リテーナピン
の抜止めを行なつている。
(Prior Art) The above-mentioned impact tool means, for example, a concrete breaker, a rock drill, etc., and includes a tool body, and an impact element such as a chisel or bit rod inserted and held in the front part of the tool body (hereinafter referred to in this specification). (referred to simply as a chisel) and a chisel attachment device for retaining the chisel inserted into the front of the tool body. As shown in Utility Model Application Publication No. 57-75984, the chisel mounting device may include a retainer pin insertion hole extending through the front part of the tool body in a direction orthogonal to the insertion direction of the chisel. By inserting the retainer pin,
The chisel is attached to the tool body.
However, if the retainer pin is simply inserted into the insertion hole, it will fall out from the hole, so a retaining pin insertion hole is formed at one end of the retainer pin and extends through the retainer pin in the diametrical direction. The retainer pin is prevented from coming off by fitting the retainer pin into the hole.

ところが、従来のチゼル取付装置においては、
上記リテーナピンの長さをリテーナピン嵌挿孔よ
り長くして、リテーナピンを該嵌挿孔に嵌挿した
とき、上記抜止めピン嵌挿孔が形成された上記一
端部が突出するようになし、これによつて抜止め
ピンを該嵌挿孔に嵌挿するようにしているので、
該抜止めピンが露出しており、従つてこの抜止め
ピンがその嵌挿孔から抜出てしまうおそれがあつ
たり、またこの抜止めピンやリテーナピンの突出
部を岩等から保護するため工具本体に突起等を設
ける必要があつた。
However, in the conventional chisel attachment device,
The length of the retainer pin is made longer than the retainer pin insertion hole, and when the retainer pin is inserted into the insertion hole, the one end portion in which the retaining pin insertion hole is formed protrudes; Since the retaining pin is inserted into the insertion hole,
The retaining pin is exposed, so there is a risk that the retaining pin may be pulled out of its insertion hole, and the tool body is designed to protect the protruding portions of the retainer pin and retainer pin from rocks, etc. It was necessary to provide protrusions etc.

(考案の目的) そこで、本考案は、従来のチゼル取付装置の欠
点に鑑み、抜止めピンが抜出すことが防止でき、
かつ抜止めピンやリテーナピンを保護するために
工具に突起等を設ける必要のない衝撃工具のチゼ
ル取付装置を提供することを目的とするものであ
る。
(Purpose of the invention) Therefore, in view of the shortcomings of the conventional chisel attachment device, the present invention can prevent the retaining pin from being pulled out.
Another object of the present invention is to provide a chisel attachment device for an impact tool that does not require a protrusion or the like to be provided on the tool to protect a retaining pin or a retainer pin.

(考案の構成) 本考案の衝撃工具のチゼル取付装置は、チゼル
が挿入される衝撃工具本体の前部を、前記チゼル
の挿入方向と直交する方向に貫通して延びるリテ
ーナピン嵌挿孔、一端に拡径部が、他端に直径方
向に貫通して延びる抜止めピン嵌挿孔が形成さ
れ、長さが前記リテーナピン嵌挿孔以下に設定さ
れたリテーナピン、前記リテーナピン嵌挿孔に嵌
挿された前記リテーナピンの前記抜止めピン嵌挿
孔に嵌挿された状態で、前記リテーナピンの抜止
めを行なう抜止めピン、前記リテーナピンの拡径
部を受けるため、前記リテーナピン嵌挿孔の一端
に設けられた第1座ぐり状拡径部、および前記抜
止めピン嵌挿孔に嵌挿された抜止めピンを、前記
リテーナピンの長手方向軸を中心として回転可能
に受けるため、前記リテーナピン嵌挿孔の他端に
設けられた第2座ぐり状拡径部を備えたことを特
徴とするものである。
(Structure of the invention) The chisel mounting device for an impact tool of the invention includes a retainer pin insertion hole extending through the front part of the impact tool main body into which the chisel is inserted in a direction perpendicular to the insertion direction of the chisel, and a retainer pin insertion hole extending at one end. A retaining pin insertion hole is formed at the other end of the enlarged diameter portion and extends through the retainer pin insertion hole in the diametrical direction, and a retainer pin whose length is set to be equal to or less than the retainer pin insertion hole is inserted into the retainer pin insertion hole. a retaining pin that prevents the retainer pin from coming out when the retainer pin is inserted into the retaining pin insertion hole; In order to rotatably receive the retaining pin fitted into the first counterbore-shaped enlarged diameter portion and the retaining pin insertion hole, the other end of the retainer pin insertion hole is rotatably centered around the longitudinal axis of the retainer pin. The present invention is characterized by comprising a second counterbore-shaped enlarged diameter portion provided at.

(実施例) 以下添付図面を参照しつつ本考案の好ましい実
施例による衝撃工具のチゼル取付装置について説
明する。
(Embodiment) A chisel attachment device for an impact tool according to a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

第1図は、本考案の衝撃工具のチゼル取付装置
の横断面図、および第2図、第3図は、それぞれ
第1図の線A−A,B−Bに沿う断面図である。
FIG. 1 is a cross-sectional view of a chisel attachment device for an impact tool according to the present invention, and FIGS. 2 and 3 are cross-sectional views taken along lines A-A and B-B in FIG. 1, respectively.

コンクリートブレーカ、かく岩機等である衝撃
工具1は、よく知られているようにシリンダであ
る工具本体2、この工具本体2の前部に後部が挿
入されたチゼル3、およびこのチゼル3の後方の
工具本体2間に配され、往復動することによつて
該チゼル3を打撃する打撃ピストン4を有してい
る。
As is well known, an impact tool 1 such as a concrete breaker or rock drill includes a tool body 2 which is a cylinder, a chisel 3 whose rear end is inserted into the front of the tool body 2, and a rear part of the chisel 3. It has a striking piston 4 which is disposed between the tool bodies 2 and strikes the chisel 3 by reciprocating.

上記工具本体2の前部には、上記チゼル3の挿
入方向と直交する方向に貫通して延びるリテーナ
ピン嵌挿孔5が形成されている。この工具本体2
のリテーナピン嵌挿孔5の両端位置には、該孔5
より径の大きな第1および第2座ぐり部6,7が
形成されている。工具本体2には更に、上記第2
座ぐり部7の直径方向に、該工具本体2を貫通し
て延びる抜止めピンガイド孔2aが設けられてい
る。この孔2aは、抜止めピン11のガイドを行
なえるならば、溝の形状であつてもよい。
A retainer pin insertion hole 5 is formed in the front portion of the tool body 2 and extends through the tool body 2 in a direction perpendicular to the direction in which the chisel 3 is inserted. This tool body 2
There are holes 5 at both ends of the retainer pin insertion hole 5.
First and second counterbore portions 6, 7 having a larger diameter are formed. The tool body 2 further includes the second
A retaining pin guide hole 2a extending through the tool body 2 is provided in the diametrical direction of the counterbore portion 7. This hole 2a may be in the shape of a groove as long as it can guide the retaining pin 11.

上記リテーナピン嵌挿孔5には、工具本体2に
挿入されたチゼル3に長手方向に延びるように形
成されている凹部3aに係合して、該チゼル3を
保持するリテーナピン8が嵌挿されるようになつ
ている。このリテーナピン8は、上記リテーナピ
ン嵌挿孔5の長さとほぼ等しいかそれよりわずか
に短かくされており、その一端に拡径ヘツド9が
形成されており、他端にその直径方向に貫通して
延びる抜止めピン嵌挿孔10が形成されている。
A retainer pin 8 that holds the chisel 3 by engaging with a recess 3a formed in the chisel 3 inserted into the tool body 2 so as to extend in the longitudinal direction is inserted into the retainer pin insertion hole 5. It's getting old. This retainer pin 8 has a length that is approximately equal to or slightly shorter than the length of the retainer pin insertion hole 5, and has an enlarged diameter head 9 formed at one end thereof, and a diameter-enlarged head 9 formed at the other end. An extending retaining pin insertion hole 10 is formed.

リテーナピン8は、第1座ぐり部6にその拡径
ヘツド9が座した状態で上記リテーナピン嵌挿孔
5に嵌挿されて、上記凹部3aに係合してチゼル
3を保持するようになつている。リテーナピン8
がこの嵌挿状態にあるとき、該リテーナピン8が
孔5から抜出るのを防止するため、このリテーナ
ピン8の抜止めピン嵌挿孔10にはスプリングピ
ンである抜止めピン11が嵌挿されるようになつ
ている。この抜止めピン11は、上記抜止めピン
嵌挿孔10を抜止めピンガイド孔2aに整列させ
た状態にしておき、この状態で該ガイド孔2aを
利用して嵌挿孔10に嵌挿されるようになつてい
る。抜止めピン11は、第2座ぐり部7の直径よ
り短かく設定されており、これによつてチゼル3
が前後方向に往復動するとき、第2座ぐり部7内
を回転して、リテーナピン8の回転を許すように
なつている。
The retainer pin 8 is inserted into the retainer pin insertion hole 5 with its enlarged diameter head 9 seated in the first counterbore 6, and is engaged with the recess 3a to hold the chisel 3. There is. Retainer pin 8
In order to prevent the retainer pin 8 from coming out of the hole 5 when the retainer pin 8 is in this inserted state, a retaining pin 11, which is a spring pin, is inserted into the retaining pin insertion hole 10 of the retainer pin 8. It's getting old. This retaining pin 11 is inserted into the retaining pin insertion hole 10 by aligning the retaining pin insertion hole 10 with the retaining pin guide hole 2a in this state using the guide hole 2a. It's becoming like that. The retaining pin 11 is set to be shorter than the diameter of the second counterbore 7, so that the chisel 3
When the retainer pin 8 reciprocates in the front-rear direction, it rotates within the second counterbore portion 7, allowing the retainer pin 8 to rotate.

(考案の効果) 本考案の衝撃工具のチゼル取付装置において
は、上記したようにリテーナピン8の端部および
この端部に嵌挿される抜止めピン11が工具本体
2の表面から突出することがないので、従来装置
の場合のように特別に保護突起を設ける必要がな
く、かつ第2座ぐり部7の周壁によつて上記抜止
めピン11の抜けを防止することができる。
(Effect of the invention) In the chisel mounting device for an impact tool of the invention, as described above, the end of the retainer pin 8 and the retaining pin 11 fitted into this end do not protrude from the surface of the tool body 2. Therefore, unlike the conventional device, there is no need to provide a special protective protrusion, and the peripheral wall of the second counterbore portion 7 can prevent the retaining pin 11 from coming off.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本考案の実施例による衝撃工具のチ
ゼル取付装置の横断面図、第2図は、第1図の線
A−Aに沿う断面図、第3図は、第1図の線B−
Bに沿う断面図、である。 1……衝撃工具、2……工具本体、2a……抜
止めピンガイド孔、3……チゼル、5……リテー
ナピン嵌挿孔、7……座ぐり部、8……リテーナ
ピン、10……抜止めピン嵌挿孔、11……抜止
めピン。
1 is a cross-sectional view of a chisel attachment device for an impact tool according to an embodiment of the present invention; FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1; and FIG. B-
FIG. 1... Impact tool, 2... Tool body, 2a... Removal pin guide hole, 3... Chisel, 5... Retainer pin insertion hole, 7... Counterbore, 8... Retainer pin, 10... Removal Retaining pin insertion hole, 11...Retaining pin.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] チゼルが挿入される衝撃工具本体の前部を、前
記チゼルの挿入方向と直交する方向に貫通して延
びるリテーナピン嵌挿孔、一端に拡径部が、他端
に直径方向に貫通して延びる抜止めピン嵌挿孔が
形成され、長さが前記リテーナピン嵌挿孔以下に
設定されたリテーナピン、前記リテーナピン嵌挿
孔に嵌挿された前記リテーナピンの前記抜止めピ
ン嵌挿孔に嵌挿された状態で、前記リテーナピン
の抜止めを行なう抜止めピン、前記リテーナピン
の拡径部を受けるため、前記リテーナピン嵌挿孔
の一端に設けられた第1座ぐり状拡径部、および
前記抜止めピン嵌挿孔に嵌挿された抜止めピン
を、前記リテーナピンの長手方向軸を中心として
回転可能に受けるため、前記リテーナピン嵌挿孔
の他端に設けられた第2座ぐり状拡径部を備えた
衝撃工具のチゼル取付装置。
A retainer pin insertion hole extends through the front part of the impact tool body into which the chisel is inserted in a direction perpendicular to the insertion direction of the chisel, an enlarged diameter part is provided at one end, and an extraction hole extends diametrically through the other end. A retainer pin having a retaining pin insertion hole formed therein and having a length set to be equal to or less than the retainer pin insertion hole, and a state in which the retainer pin is inserted into the retaining pin insertion hole and the retainer pin is inserted into the retainer pin insertion hole. a retaining pin for retaining the retainer pin, a first counterbore-like enlarged diameter portion provided at one end of the retainer pin insertion hole to receive the expanded diameter portion of the retainer pin, and a first counterbore-shaped enlarged diameter portion provided at one end of the retainer pin insertion hole; The shock absorber includes a second counterbore-shaped enlarged diameter portion provided at the other end of the retainer pin insertion hole to rotatably receive the retaining pin inserted into the hole about the longitudinal axis of the retainer pin. Tool chisel attachment device.
JP13899483U 1983-09-06 1983-09-06 Impact tool chisel attachment device Granted JPS6045674U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13899483U JPS6045674U (en) 1983-09-06 1983-09-06 Impact tool chisel attachment device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13899483U JPS6045674U (en) 1983-09-06 1983-09-06 Impact tool chisel attachment device

Publications (2)

Publication Number Publication Date
JPS6045674U JPS6045674U (en) 1985-03-30
JPH0131432Y2 true JPH0131432Y2 (en) 1989-09-26

Family

ID=30311685

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13899483U Granted JPS6045674U (en) 1983-09-06 1983-09-06 Impact tool chisel attachment device

Country Status (1)

Country Link
JP (1) JPS6045674U (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5875681U (en) * 1981-11-16 1983-05-21 日本ニユ−マチツク工業株式会社 chisel locking device
JPS58172565U (en) * 1982-05-14 1983-11-18 高木 恒男 Attachment for perforation of percussion device

Also Published As

Publication number Publication date
JPS6045674U (en) 1985-03-30

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